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//
// Copyright (c) Benjamin Kaufmann 2010
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This file is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
//
// NOTE: ProgramOptions is inspired by Boost.Program_options
// see: www.boost.org/libs/program_options
//
#ifndef PROGRAM_OPTIONS_MAPPED_VALUE_H_INCLUDED
#define PROGRAM_OPTIONS_MAPPED_VALUE_H_INCLUDED
#ifdef _MSC_VER
#pragma warning (disable : 4786)
#pragma warning (disable : 4503)
#endif
#include "typed_value.h"
#include "value_store.h"
#include <string>
#include <cstddef>
#include <map>
#if defined(_MSC_VER) && _MSC_VER <= 1200
namespace std { using ::size_t; }
#endif
namespace ProgramOptions {
///////////////////////////////////////////////////////////////////////////////
// ValueMap
///////////////////////////////////////////////////////////////////////////////
//! Type for storing anonymous values
/*!
* Maps option names to their values
*/
class ValueMap {
public:
ValueMap() {}
~ValueMap(){}
bool empty() const { return map_.empty(); }
size_t size() const { return map_.size(); }
size_t count(const std::string& name) const { return map_.count(name); }
void clear() { map_.clear(); }
const ValueStore& operator[](const std::string& name) const {
MapType::const_iterator it = map_.find(name);
if (it == map_.end()) {
throw UnknownOption("ValueMap", name);
}
return it->second;
}
template <class T>
static bool add(ValueMap* this_, const std::string& name, const T* value) {
MapType::iterator it = this_->map_.find(name);
if (it == this_->map_.end()) {
it = this_->map_.insert(it, MapType::value_type(name, ValueStore()));
}
if (it->second.extract_raw() != value) {
it->second.assimilate(const_cast<T*>(value));
}
return true;
}
private:
ValueMap(const ValueMap&);
ValueMap& operator=(const ValueMap&);
typedef std::map<std::string, ValueStore> MapType;
MapType map_;
};
/*!
* Creates a value that is created on demand and stored in a given value map.
*
* \see OptionGroup::addOptions()
*/
template <class T>
inline NotifiedValue<T>* store(ValueMap& map, typename detail::Parser<T>::type p = &string_cast<T>) {
return notify<T>(&map, &ValueMap::add<T>, p);
}
inline NotifiedValue<bool>* flag(ValueMap& map, FlagAction a = store_true) {
return flag(&map, &ValueMap::add<bool>, a);
}
}
#endif
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